1 /* Copyright (c) 2008, 2009
2 * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
3 * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
4 * Micah Cowan (micah@cowan.name)
5 * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
6 * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
7 * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
8 * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
9 * Copyright (c) 1987 Oliver Laumann
12 * Authors: Hadi Bargi Rangin bargi@dots.physics.orst.edu
13 * Bill Barry barryb@dots.physics.orst.edu
14 * Randy Lundquist randyl@dots.physics.orst.edu
16 * Modifications Copyright (c) 1995 by
17 * Science Access Project, Oregon State University.
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 3, or (at your option)
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program (see the file COPYING); if not, see
32 * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
33 * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
35 ****************************************************************
38 #include <sys/types.h>
44 # include <sys/sysmacros.h>
49 # include <sys/ioctl.h>
59 # include <sys/stropts.h>
62 #if defined(SYSV) && !defined(ISC)
63 # include <sys/utsname.h>
66 #if defined(sequent) || defined(SVR4)
67 # include <sys/resource.h>
68 #endif /* sequent || SVR4 */
72 # include <sys/sioctl.h>
76 #if (defined(AUX) || defined(_AUX_SOURCE)) && defined(POSIX)
79 #if defined(USE_LOCALE) || defined(ENCODINGS)
82 #if defined(HAVE_NL_LANGINFO) && defined(ENCODINGS)
83 # include <langinfo.h>
91 #include "patchlevel.h"
94 * At the moment we only need the real password if the
95 * builtin lock is used. Therefore disable SHADOWPW if
96 * we do not really need it (kind of security thing).
105 #endif /* SHADOWPW */
107 #include "logfile.h" /* islogfile, logfflush */
114 extern char Term
[], screenterm
[], **environ
, Termcap
[];
116 int VBellWait
, MsgWait
, MsgMinWait
, SilenceWait
;
118 extern struct acluser
*users
;
119 extern struct display
*displays
, *display
;
122 extern int visual_bell
;
124 extern unsigned char mark_key_tab
[];
126 extern char version
[];
127 extern char DefaultShell
[];
129 extern char *zmodem_sendcmd
;
130 extern char *zmodem_recvcmd
;
132 extern struct layout
*layout_last
;
138 extern struct NewWindow nwin_undef
, nwin_default
, nwin_options
;
141 static struct passwd
*getpwbyname
__P((char *, struct passwd
*));
142 static void SigChldHandler
__P((void));
143 static sigret_t SigChld
__P(SIGPROTOARG
);
144 static sigret_t SigInt
__P(SIGPROTOARG
);
145 static sigret_t CoreDump
__P(SIGPROTOARG
);
146 static sigret_t FinitHandler
__P(SIGPROTOARG
);
147 static void DoWait
__P((void));
148 static void serv_read_fn
__P((struct event
*, char *));
149 static void serv_select_fn
__P((struct event
*, char *));
150 static void logflush_fn
__P((struct event
*, char *));
151 static void backtick_filter
__P((struct backtick
*));
152 static void backtick_fn
__P((struct event
*, char *));
153 static char *runbacktick
__P((struct backtick
*, int *, time_t));
154 static int IsSymbol
__P((char *, char *));
155 static char *ParseChar
__P((char *, char *));
156 static int ParseEscape
__P((char *));
157 static char *pad_expand
__P((char *, char *, int, int));
159 static void fds
__P((void));
162 int nversion
; /* numerical version, used for secondary DA */
170 struct mode attach_Mode
;
172 char SockPath
[MAXPATHLEN
+ 2 * MAXSTR
];
173 char *SockName
; /* SockName is pointer in SockPath */
174 char *SockMatch
= NULL
; /* session id command line argument */
175 int ServerSocket
= -1;
176 struct event serv_read
;
177 struct event serv_select
;
178 struct event logflushev
;
180 char **NewEnv
= NULL
;
182 char *RcFileName
= NULL
;
185 char *screenlogfile
; /* filename layout */
186 int log_flush
= 10; /* flush interval in seconds */
187 int logtstamp_on
= 0; /* tstamp disabled */
188 char *logtstamp_string
; /* stamp layout */
189 int logtstamp_after
= 120; /* first tstamp after 120s */
190 char *hardcopydir
= NULL
;
192 char *VisualBellString
;
193 char *ActivityString
;
198 char *PowDetachString
;
206 int iflag
, rflag
, dflag
, lsflag
, quietflag
, wipeflag
, xflag
;
217 int tty_oldmode
= -1;
220 char HostName
[MAXSTR
];
221 int MasterPid
, PanicPid
;
222 int real_uid
, real_gid
, eff_uid
, eff_gid
;
224 int ZombieKey_destroy
, ZombieKey_resurrect
, ZombieKey_onerror
;
225 char *preselect
= NULL
; /* only used in Attach() */
228 char *screenencodings
;
241 struct layer
*flayer
;
244 struct win
*console_window
;
253 char strnomem
[] = "Out of memory.";
256 static int InterruptPlease
;
257 static int GotSigChld
;
260 lf_secreopen(name
, wantfd
, l
)
268 if (((got_fd
= secopen(name
, O_WRONLY
| O_CREAT
| O_APPEND
, 0666)) < 0) ||
269 lf_move_fd(got_fd
, wantfd
) < 0)
272 debug1("lf_secreopen: failed for %s\n", name
);
275 l
->st
->st_ino
= l
->st
->st_dev
= 0;
276 debug2("lf_secreopen: %d = %s\n", wantfd
, name
);
280 /********************************************************************/
281 /********************************************************************/
282 /********************************************************************/
285 static struct passwd
*
286 getpwbyname(name
, ppp
)
292 struct spwd
*sss
= NULL
;
293 static char *spw
= NULL
;
296 if (!ppp
&& !(ppp
= getpwnam(name
)))
299 /* Do password sanity check..., allow ##user for SUN_C2 security */
304 if (ppp
->pw_passwd
[0] == '#' && ppp
->pw_passwd
[1] == '#' &&
305 strcmp(ppp
->pw_passwd
+ 2, ppp
->pw_name
) == 0)
309 char c
= ppp
->pw_passwd
[n
];
310 if (!(c
== '.' || c
== '/' || c
== '$' ||
311 (c
>= '0' && c
<= '9') ||
312 (c
>= 'a' && c
<= 'z') ||
313 (c
>= 'A' && c
<= 'Z')))
318 /* try to determine real password */
319 if (n
< 13 && sss
== 0)
321 sss
= getspnam(ppp
->pw_name
);
326 ppp
->pw_passwd
= spw
= SaveStr(sss
->sp_pwdp
);
327 endspent(); /* this should delete all buffers ... */
330 endspent(); /* this should delete all buffers ... */
336 if (ppp
->pw_passwd
&& strlen(ppp
->pw_passwd
) == 13 + 11)
337 ppp
->pw_passwd
[13] = 0; /* beware of linux's long passwords */
350 s
= getenv("LC_ALL");
352 s
= getenv("LC_CTYPE");
367 char socknamebuf
[2 * MAXSTR
];
369 char *myname
= (ac
== 0) ? "screen" : av
[0];
372 #ifdef _MODE_T /* (jw) */
377 #if defined(SYSV) && !defined(ISC)
378 struct utsname utsnam
;
380 struct NewWindow nwin
;
381 int detached
= 0; /* start up detached */
385 char *script_file
= 0;
388 #if (defined(AUX) || defined(_AUX_SOURCE)) && defined(POSIX)
389 setcompat(COMPAT_POSIX
|COMPAT_BSDPROT
); /* turn on seteuid support */
391 #if defined(sun) && defined(SVR4)
393 /* Solaris' login blocks SIGHUP! This is _very bad_ */
396 sigprocmask(SIG_SETMASK
, &sset
, 0);
401 * First, close all unused descriptors
402 * (otherwise, we might have problems with the select() call)
408 snprintf(version
, 59, "%d.%.2d.%.2d%s (%s%s) %s", REV
, VERS
,
409 PATCHLEVEL
, STATE
, ORIGIN
, GIT_REV
, DATE
);
410 nversion
= REV
* 10000 + VERS
* 100 + PATCHLEVEL
;
411 debug2("-- screen debug started %s (%s)\n", *av
, version
);
425 debug("NAMEDPIPE\n");
427 #if defined(SIGWINCH) && defined(TIOCGWINSZ)
428 debug("Window size changing enabled\n");
458 debug1("NAME_MAX = %d\n", NAME_MAX
);
461 BellString
= SaveStr("Bell in window %n");
462 VisualBellString
= SaveStr(" Wuff, Wuff!! ");
463 ActivityString
= SaveStr("Activity in window %n");
464 screenlogfile
= SaveStr("screenlog.%n");
465 logtstamp_string
= SaveStr("-- %n:%t -- time-stamp -- %M/%d/%y %c:%s --\n");
466 hstatusstring
= SaveStr("%h");
467 captionstring
= SaveStr("%3n %t");
468 timestring
= SaveStr("%c:%s %M %d %H%? %l%?");
469 wlisttit
= SaveStr("Num Name%=Flags");
470 wliststr
= SaveStr("%3n %t%=%f");
472 BufferFile
= SaveStr(DEFAULT_BUFFERFILE
);
478 default_startup
= (ac
> 1) ? 0 : 1;
480 VBellWait
= VBELLWAIT
* 1000;
481 MsgWait
= MSGWAIT
* 1000;
482 MsgMinWait
= MSGMINWAIT
* 1000;
483 SilenceWait
= SILENCEWAIT
;
488 zmodem_sendcmd
= SaveStr("!!! sz -vv -b ");
489 zmodem_recvcmd
= SaveStr("!!! rz -vv -b -E");
493 CompileKeys((char *)0, 0, mark_key_tab
);
497 screenencodings
= SaveStr(SCREENENCODINGS
);
503 nwin_options
= nwin_undef
;
504 strcpy(screenterm
, "screen");
506 logreopen_register(lf_secreopen
);
509 /* if this is a login screen, assume -RR */
518 ShellProg
= SaveStr(DefaultShell
); /* to prevent nasty circles */
523 if (--ac
> 0 && *ap
== '-')
525 if (ap
[1] == '-' && ap
[2] == 0)
531 if (ap
[1] == '-' && !strcmp(ap
, "--version"))
532 Panic(0, "Screen version %s", version
);
533 if (ap
[1] == '-' && !strcmp(ap
, "--help"))
534 exit_with_usage(myname
, NULL
, NULL
);
535 while (ap
&& *ap
&& *++ap
)
540 nwin_options
.aflag
= 1;
545 case 'p': /* preselect */
551 exit_with_usage(myname
, "Specify a window to preselect with -p", NULL
);
558 bd
.bd_start_braille
= 1;
567 exit_with_usage(myname
, "Specify an alternate rc-filename with -c", NULL
);
576 exit_with_usage(myname
, "Specify command characters with -e", NULL
);
580 Panic(0, "Two characters are required with -e option, not '%s'.", ap
);
589 nwin_options
.flowflag
= FLOW_NOW
* 0;
596 nwin_options
.flowflag
= FLOW_NOW
* 1;
599 nwin_options
.flowflag
= FLOW_AUTOFLAG
;
602 exit_with_usage(myname
, "Unknown flow option -%s", --ap
);
607 exit_with_usage(myname
, NULL
, NULL
);
608 nwin_options
.histheight
= atoi(*++av
);
609 if (nwin_options
.histheight
< 0)
610 exit_with_usage(myname
, "-h: %s: negative scrollback size?", *av
);
615 case 't': /* title, the former AkA == -k */
617 exit_with_usage(myname
, "Specify a new window-name with -t", NULL
);
618 nwin_options
.aka
= *++av
;
626 nwin_options
.lflag
= 0;
633 nwin_options
.lflag
= 1;
636 nwin_options
.lflag
= 3;
639 case 'i': /* -list */
641 if (ac
> 1 && !SockMatch
)
649 exit_with_usage(myname
, "%s: Unknown suboption to -l", --ap
);
655 if (ac
> 1 && !SockMatch
)
662 nwin_options
.Lflag
= 1;
667 case 'O': /* to be (or not to be?) deleted. jw. */
672 exit_with_usage(myname
, "Specify terminal-type with -T", NULL
);
673 if (strlen(*++av
) < 20)
674 strcpy(screenterm
, *av
);
676 Panic(0, "-T: terminal name too long. (max. 20 char)");
677 nwin_options
.term
= screenterm
;
687 if (ac
> 1 && *av
[1] != '-' && !SockMatch
)
691 debug2("rflag=%d, SockMatch=%s\n", dflag
, SockMatch
);
699 rflag
+= (*ap
== 'R') ? 2 : 1;
710 if (*av
[1] != '-' && !SockMatch
)
714 debug2("dflag=%d, SockMatch=%s\n", dflag
, SockMatch
);
721 exit_with_usage(myname
, "Specify shell with -s", NULL
);
724 ShellProg
= SaveStr(*++av
);
725 debug1("ShellProg: '%s'\n", ShellProg
);
731 exit_with_usage(myname
, "Specify session-name with -S", NULL
);
735 exit_with_usage(myname
, "Empty session-name?", NULL
);
741 Panic(0, "Screen version %s", version
);
745 nwin_options
.encoding
= nwin_options
.encoding
== -1 ? UTF8
: 0;
750 exit_with_usage(myname
, "Specify lua script file with -u", NULL
);
753 script_file
= SaveStr(*++av
);
756 exit_with_usage(myname
, "Unknown option %s", --ap
);
768 if (eff_uid
!= real_uid
)
770 /* if running with s-bit, we must install a special signal
771 * handler routine that resets the s-bit, so that we get a
774 #ifdef SIGBUS /* OOPS, linux has no bus errors! */
775 signal(SIGBUS
, CoreDump
);
777 signal(SIGSEGV
, CoreDump
);
781 setlocale(LC_ALL
, "");
784 if (nwin_options
.encoding
== -1)
786 /* ask locale if we should start in UTF-8 mode */
787 # ifdef HAVE_NL_LANGINFO
789 setlocale(LC_CTYPE
, "");
791 nwin_options
.encoding
= FindEncoding(nl_langinfo(CODESET
));
792 debug1("locale says encoding = %d\n", nwin_options
.encoding
);
796 if ((s
= locale_name()) && InStr(s
, "UTF-8"))
797 nwin_options
.encoding
= UTF8
;
799 debug1("environment says encoding=%d\n", nwin_options
.encoding
);
805 if ((s
= locale_name()))
807 if(!strncmp(s
, "zh_", 3) || !strncmp(s
, "ja_", 3) || !strncmp(s
, "ko_", 3))
815 if (nwin_options
.aka
)
818 if (nwin_options
.encoding
> 0)
820 size_t len
= strlen(nwin_options
.aka
);
822 char *newbuf
= malloc(3 * len
);
825 newsz
= RecodeBuf(nwin_options
.aka
, len
,
826 nwin_options
.encoding
, 0, newbuf
);
827 newbuf
[newsz
] = '\0';
828 nwin_options
.aka
= newbuf
;
833 /* If we just use the original value from av,
834 subsequent shelltitle invocations will attempt to free
835 space we don't own... */
836 nwin_options
.aka
= SaveStr(nwin_options
.aka
);
840 if (SockMatch
&& strlen(SockMatch
) >= MAXSTR
)
841 Panic(0, "Ridiculously long socketname - try again.");
842 if (cmdflag
&& !rflag
&& !dflag
&& !xflag
)
844 if (!cmdflag
&& dflag
&& mflag
&& !(rflag
|| xflag
))
848 nwin
.encoding
= nwin_undef
.encoding
; /* let screenrc overwrite it */
853 /* make the write() calls return -1 on all errors */
856 * Ronald F. Guilmette, Oct 29 '94, bug-gnu-utils@prep.ai.mit.edu:
857 * It appears that in System V Release 4, UNIX, if you are writing
858 * an output file and you exceed the currently set file size limit,
859 * you _don't_ just get the call to `write' returning with a
860 * failure code. Rather, you get a signal called `SIGXFSZ' which,
861 * if neither handled nor ignored, will cause your program to crash
864 signal(SIGXFSZ
, SIG_IGN
);
868 signal(SIGPIPE
, SIG_IGN
);
875 sh
= getenv("SHELL");
876 ShellProg
= SaveStr(sh
? sh
: DefaultShell
);
878 ShellArgs
[0] = ShellProg
;
879 home
= getenv("HOME");
880 if (!mflag
&& !SockMatch
)
883 if (sty
&& *sty
== 0)
888 if (!(nethackflag
= (getenv("NETHACKOPTIONS") != NULL
)))
890 char nethackrc
[MAXPATHLEN
];
892 if (home
&& (strlen(home
) < (MAXPATHLEN
- 20)))
894 sprintf(nethackrc
,"%s/.nethackrc", home
);
895 nethackflag
= !access(nethackrc
, F_OK
);
901 own_uid
= multi_uid
= real_uid
;
902 if (SockMatch
&& (sockp
= index(SockMatch
, '/')))
906 SockMatch
= sockp
+ 1;
910 if ((mppp
= getpwnam(multi
)) == (struct passwd
*)0)
911 Panic(0, "Cannot identify account '%s'.", multi
);
912 multi_uid
= mppp
->pw_uid
;
913 multi_home
= SaveStr(mppp
->pw_dir
);
914 if (strlen(multi_home
) > MAXPATHLEN
- 10)
915 Panic(0, "home directory path too long");
917 /* always fake multi attach mode */
924 /* Special case: effective user is multiuser. */
925 if (eff_uid
&& (multi_uid
!= eff_uid
))
926 Panic(0, "Must run suid root for multiuser support.");
928 if (SockMatch
&& *SockMatch
== 0)
930 #endif /* MULTIUSER */
932 if ((LoginName
= getlogin()) && LoginName
[0] != '\0')
934 if ((ppp
= getpwnam(LoginName
)) != (struct passwd
*) 0)
935 if ((int)ppp
->pw_uid
!= real_uid
)
936 ppp
= (struct passwd
*) 0;
940 if ((ppp
= getpwuid(real_uid
)) == 0)
942 Panic(0, "getpwuid() can't identify your account!");
945 LoginName
= ppp
->pw_name
;
947 LoginName
= SaveStr(LoginName
);
949 ppp
= getpwbyname(LoginName
, ppp
);
951 #if !defined(SOCKDIR) && defined(MULTIUSER)
952 if (multi
&& !multiattach
)
954 if (home
&& strcmp(home
, ppp
->pw_dir
))
955 Panic(0, "$HOME must match passwd entry for multiuser screens.");
959 #define SET_GUID() do \
963 eff_uid = real_uid; \
964 eff_gid = real_gid; \
967 #define SET_TTYNAME(fatal) do \
969 if (!(attach_tty = ttyname(0))) \
972 Panic(0, "Must be connected to a terminal."); \
976 else if (stat(attach_tty, &st)) \
977 Panic(errno, "Cannot access '%s'", attach_tty); \
978 if (strlen(attach_tty) >= MAXPATHLEN) \
979 Panic(0, "TtyName too long - sorry."); \
982 if (home
== 0 || *home
== '\0')
984 if (strlen(LoginName
) > 20)
985 Panic(0, "LoginName too long - sorry.");
987 if (multi
&& strlen(multi
) > 20)
988 Panic(0, "Screen owner name too long - sorry.");
990 if (strlen(home
) > MAXPATHLEN
- 25)
991 Panic(0, "$HOME too long - sorry.");
994 if (!detached
&& !lsflag
&& !cmdflag
&& !(dflag
&& !mflag
&& !rflag
&& !xflag
) && !(!mflag
&& !SockMatch
&& sty
&& !xflag
))
1000 /* ttyname implies isatty */
1003 tty_mode
= (int)st
.st_mode
& 0777;
1007 fl
= fcntl(0, F_GETFL
, 0);
1008 if (fl
!= -1 && (fl
& (O_RDWR
|O_RDONLY
|O_WRONLY
)) == O_RDWR
)
1011 if (attach_fd
== -1)
1013 if ((n
= secopen(attach_tty
, O_RDWR
| O_NONBLOCK
, 0)) < 0)
1014 Panic(0, "Cannot open your terminal '%s' - please check.", attach_tty
);
1017 debug2("attach_tty is %s, attach_fd is %d\n", attach_tty
, attach_fd
);
1019 if ((attach_term
= getenv("TERM")) == 0 || *attach_term
== 0)
1020 Panic(0, "Please set a terminal type.");
1021 if (strlen(attach_term
) > sizeof(D_termname
) - 1)
1022 Panic(0, "$TERM too long - sorry.");
1023 GetTTY(0, &attach_Mode
);
1024 #ifdef DEBUGGGGGGGGGGGGGGG
1025 DebugTTY(&attach_Mode
);
1030 oumask
= umask(0); /* well, unsigned never fails? jw. */
1032 if ((oumask
= (int)umask(0)) == -1)
1033 Panic(errno
, "Cannot change umask to zero");
1035 SockDir
= getenv("SCREENDIR");
1038 if (strlen(SockDir
) >= MAXPATHLEN
- 1)
1039 Panic(0, "Ridiculously long $SCREENDIR - try again.");
1042 Panic(0, "No $SCREENDIR with multi screens, please.");
1049 sprintf(SockPath
, "%s/.screen", multi_home
);
1053 sprintf(SockPath
, "%s/S-%s", SockDir
, multi
);
1062 sprintf(SockPath
, "%s/.screen", home
);
1068 if (access(SockDir
, F_OK
))
1070 debug1("SockDir '%s' missing ...\n", SockDir
);
1071 if (UserContext() > 0)
1073 if (mkdir(SockDir
, 0700))
1077 if (UserStatus() <= 0)
1078 Panic(0, "Cannot make directory '%s'.", SockDir
);
1080 if (SockDir
!= SockPath
)
1081 strcpy(SockPath
, SockDir
);
1087 if (lstat(SockDir
, &st
))
1089 n
= (eff_uid
== 0 && (real_uid
|| eff_gid
== real_gid
)) ? 0755 :
1090 (eff_gid
!= real_gid
) ? 0775 :
1096 if (mkdir(SockDir
, n
) == -1)
1097 Panic(errno
, "Cannot make directory '%s'", SockDir
);
1101 if (!S_ISDIR(st
.st_mode
))
1102 Panic(0, "'%s' must be a directory.", SockDir
);
1103 if (eff_uid
== 0 && real_uid
&& (int)st
.st_uid
!= eff_uid
)
1104 Panic(0, "Directory '%s' must be owned by root.", SockDir
);
1105 n
= (eff_uid
== 0 && (real_uid
|| (st
.st_mode
& 0775) != 0775)) ? 0755 :
1106 (eff_gid
== (int)st
.st_gid
&& eff_gid
!= real_gid
) ? 0775 :
1108 if (((int)st
.st_mode
& 0777) != n
)
1109 Panic(0, "Directory '%s' must have mode %03o.", SockDir
, n
);
1111 sprintf(SockPath
, "%s/S-%s", SockDir
, LoginName
);
1112 if (access(SockPath
, F_OK
))
1114 if (mkdir(SockPath
, 0700) == -1)
1115 Panic(errno
, "Cannot make directory '%s'", SockPath
);
1116 (void) chown(SockPath
, real_uid
, real_gid
);
1122 if (stat(SockPath
, &st
) == -1)
1123 Panic(errno
, "Cannot access %s", SockPath
);
1125 if (!S_ISDIR(st
.st_mode
))
1126 Panic(0, "%s is not a directory.", SockPath
);
1130 if ((int)st
.st_uid
!= multi_uid
)
1131 Panic(0, "%s is not the owner of %s.", multi
, SockPath
);
1136 if ((int)st
.st_uid
!= real_uid
)
1137 Panic(0, "You are not the owner of %s.", SockPath
);
1139 if ((st
.st_mode
& 0777) != 0700)
1140 Panic(0, "Directory %s must have mode 700.", SockPath
);
1141 if (SockMatch
&& index(SockMatch
, '/'))
1142 Panic(0, "Bad session name '%s'", SockMatch
);
1143 SockName
= SockPath
+ strlen(SockPath
) + 1;
1145 (void) umask(oumask
);
1146 debug2("SockPath: %s SockMatch: %s\n", SockPath
, SockMatch
? SockMatch
: "NULL");
1148 #if defined(SYSV) && !defined(ISC)
1149 if (uname(&utsnam
) == -1)
1150 Panic(errno
, "uname");
1151 strncpy(HostName
, utsnam
.nodename
, sizeof(utsnam
.nodename
) < MAXSTR
? sizeof(utsnam
.nodename
) : MAXSTR
- 1);
1152 HostName
[sizeof(utsnam
.nodename
) < MAXSTR
? sizeof(utsnam
.nodename
) : MAXSTR
- 1] = '\0';
1154 (void) gethostname(HostName
, MAXSTR
);
1155 HostName
[MAXSTR
- 1] = '\0';
1157 if ((ap
= index(HostName
, '.')) != NULL
)
1166 real_uid
= multi_uid
;
1169 i
= FindSocket((int *)NULL
, &fo
, &oth
, SockMatch
);
1171 exit(8 + (fo
? ((oth
|| i
) ? 2 : 1) : 0) + i
);
1173 Panic(0, "No Sockets found in %s.\n", SockPath
);
1174 Panic(0, "%d Socket%s in %s.\n", fo
, fo
> 1 ? "s" : "", SockPath
);
1177 signal(SIG_BYE
, AttacherFinit
); /* prevent races */
1180 /* attach_tty is not mandatory */
1183 Panic(0, "Please specify a command.");
1185 SendCmdMessage(sty
, SockMatch
, av
);
1188 else if (rflag
|| xflag
)
1190 debug("screen -r: - is there anybody out there?\n");
1191 if (Attach(MSG_ATTACH
))
1198 Panic(0, "Can't create sessions of other users.");
1200 debug("screen -r: backend not responding -- still crying\n");
1202 else if (dflag
&& !mflag
)
1206 Msg(0, "[%s %sdetached.]\n", SockName
, (dflag
> 1 ? "power " : ""));
1210 if (!SockMatch
&& !mflag
&& sty
)
1212 /* attach_tty is not mandatory */
1215 nwin_options
.args
= av
;
1216 SendCreateMsg(sty
, &nwin
);
1220 nwin_compose(&nwin_default
, &nwin_options
, &nwin_default
);
1222 if (!detached
|| dflag
!= 2)
1230 Panic(errno
, "fork");
1238 sprintf(socknamebuf
, "%d.%s", MasterPid
, SockMatch
);
1240 sprintf(socknamebuf
, "%d.%s.%s", MasterPid
, stripdev(attach_tty
), HostName
);
1241 for (ap
= socknamebuf
; *ap
; ap
++)
1245 if (strlen(socknamebuf
) > NAME_MAX
)
1246 socknamebuf
[NAME_MAX
] = 0;
1248 sprintf(SockPath
+ strlen(SockPath
), "/%s", socknamebuf
);
1255 PanicPid
= getppid();
1257 if (DefaultEsc
== -1)
1258 DefaultEsc
= Ctrl('a');
1259 if (DefaultMetaEsc
== -1)
1260 DefaultMetaEsc
= 'a';
1262 ap
= av0
+ strlen(av0
) - 1;
1265 if (!strncmp("screen", ap
, 6))
1267 strncpy(ap
, "SCREEN", 6); /* name this process "SCREEN-BACKEND" */
1279 if (dfp
&& dfp
!= stderr
)
1281 sprintf(buf
, "%s/SCREEN.%d", DEBUGDIR
, (int)getpid());
1282 if ((dfp
= fopen(buf
, "w")) == NULL
)
1285 (void) chmod(buf
, 0666);
1290 if (attach_fd
== -1)
1292 if ((n
= secopen(attach_tty
, O_RDWR
, 0)) < 0)
1293 Panic(0, "Cannot reopen '%s' - please check.", attach_tty
);
1300 freopen("/dev/null", "r", stdin
);
1301 freopen("/dev/null", "w", stdout
);
1306 freopen("/dev/null", "w", stderr
);
1307 debug("-- screen.back debug started\n");
1310 * This guarantees that the session owner is listed, even when we
1311 * start detached. From now on we should not refer to 'LoginName'
1312 * any more, use users->u_name instead.
1314 if (UserAdd(LoginName
, (char *)0, (struct acluser
**)0) < 0)
1315 Panic(0, "Could not create user info");
1318 if (MakeDisplay(LoginName
, attach_tty
, attach_term
, n
, getppid(), &attach_Mode
) == 0)
1319 Panic(0, "Could not alloc display");
1322 D_encoding
= nwin_options
.encoding
> 0 ? nwin_options
.encoding
: 0;
1323 debug1("D_encoding = %d\n", D_encoding
);
1329 /* user started us with -S option */
1330 sprintf(socknamebuf
, "%d.%s", (int)getpid(), SockMatch
);
1334 sprintf(socknamebuf
, "%d.%s.%s", (int)getpid(), stripdev(attach_tty
),
1337 for (ap
= socknamebuf
; *ap
; ap
++)
1341 if (strlen(socknamebuf
) > NAME_MAX
)
1343 debug2("Socketname %s truncated to %d chars\n", socknamebuf
, NAME_MAX
);
1344 socknamebuf
[NAME_MAX
] = 0;
1347 sprintf(SockPath
+ strlen(SockPath
), "/%s", socknamebuf
);
1349 ServerSocket
= MakeServerSocket();
1356 ScriptSource(script_file
);
1362 # ifdef ALLOW_SYSSCREENRC
1363 if ((ap
= getenv("SYSSCREENRC")))
1364 (void)StartRc(ap
, 0);
1367 (void)StartRc(ETCSCREENRC
, 0);
1369 (void)StartRc(RcFileName
, 0);
1373 # endif /* UTNOKEEP */
1374 # endif /* UTMPOK */
1377 if (InitTermcap(0, 0))
1379 debug("Could not init termcap - exiting\n");
1380 fcntl(D_userfd
, F_SETFL
, 0); /* Flush sets FNBLOCK */
1383 Kill(D_userpid
, SIG_BYE
);
1386 MakeDefaultCanvas();
1398 signal(SIGHUP
, SigHup
);
1399 signal(SIGINT
, FinitHandler
);
1400 signal(SIGQUIT
, FinitHandler
);
1401 signal(SIGTERM
, FinitHandler
);
1403 signal(SIGTTIN
, SIG_IGN
);
1404 signal(SIGTTOU
, SIG_IGN
);
1410 SetMode(&D_OldMode
, &D_NewMode
, D_flow
, iflag
);
1411 /* Note: SetMode must be called _before_ FinishRc. */
1412 SetTTY(D_userfd
, &D_NewMode
);
1413 if (fcntl(D_userfd
, F_SETFL
, FNBLOCK
))
1414 Msg(errno
, "Warning: NBLOCK fcntl failed");
1417 brktty(-1); /* just try */
1418 signal(SIGCHLD
, SigChld
);
1420 # ifdef ALLOW_SYSSCREENRC
1421 if ((ap
= getenv("SYSSCREENRC")))
1425 FinishRc(ETCSCREENRC
);
1427 FinishRc(RcFileName
);
1429 debug2("UID %d EUID %d\n", (int)getuid(), (int)geteuid());
1430 if (windows
== NULL
)
1432 debug("We open one default window, as screenrc did not specify one.\n");
1433 if (MakeWindow(&nwin
) == -1)
1435 Msg(0, "Sorry, could not find a PTY.");
1441 else if (ac
) /* Screen was invoked with a command */
1450 if (display
&& default_startup
)
1451 display_copyright();
1452 signal(SIGINT
, SigInt
);
1453 if (rflag
&& (rflag
& 1) == 0 && !quietflag
)
1455 Msg(0, "New screen...");
1459 serv_read
.type
= EV_READ
;
1460 serv_read
.fd
= ServerSocket
;
1461 serv_read
.handler
= serv_read_fn
;
1464 serv_select
.pri
= -10;
1465 serv_select
.type
= EV_ALWAYS
;
1466 serv_select
.handler
= serv_select_fn
;
1467 evenq(&serv_select
);
1469 logflushev
.type
= EV_TIMEOUT
;
1470 logflushev
.handler
= logflush_fn
;
1478 WindowDied(p
, wstat
, wstat_valid
)
1489 if (ZombieKey_destroy
&& ZombieKey_onerror
&& wstat_valid
&&
1490 WIFEXITED(wstat
) && WEXITSTATUS(wstat
) == 0)
1493 if (ZombieKey_destroy
&& !killit
)
1495 char buf
[100], *s
, reason
[100];
1499 if (WIFEXITED(wstat
))
1500 if (WEXITSTATUS(wstat
))
1501 sprintf(reason
, "terminated with exit status %d", WEXITSTATUS(wstat
));
1503 sprintf(reason
, "terminated normally");
1504 else if (WIFSIGNALED(wstat
))
1505 sprintf(reason
, "terminated with signal %d%s", WTERMSIG(wstat
),
1507 WCOREDUMP(wstat
) ? " (core file generated)" : "");
1512 sprintf(reason
, "detached from window");
1517 s
[strlen(s
) - 1] = '\0';
1518 debug3("window %d (%s) going into zombie state fd %d",
1519 p
->w_number
, p
->w_title
, p
->w_ptyfd
);
1521 if (p
->w_slot
!= (slot_t
)0 && p
->w_slot
!= (slot_t
)-1)
1524 p
->w_slot
= 0; /* "detached" */
1529 p
->w_deadpid
= p
->w_pid
;
1532 /* p->w_y = p->w_bot; */
1533 p
->w_y
= MFindUsedLine(p
, p
->w_bot
, 1);
1534 sprintf(buf
, "\n\r=== Command %s (%s) ===", reason
, s
? s
: "?");
1535 WriteString(p
, buf
, strlen(buf
));
1536 WindowChanged(p
, 'f');
1557 signal(SIGCHLD
, SigChld
);
1560 if (stat(SockPath
, &st
) == -1)
1562 debug1("SigChldHandler: Yuck! cannot stat '%s'\n", SockPath
);
1563 if (!RecoverSocket())
1565 debug("SCREEN cannot recover from corrupt Socket, bye\n");
1569 debug1("'%s' reconstructed\n", SockPath
);
1572 debug2("SigChldHandler: stat '%s' o.k. (%03o)\n", SockPath
, (int)st
.st_mode
);
1578 debug("SigChld()\n");
1586 /* Hangup all displays */
1587 while ((display
= displays
) != 0)
1593 * the backend's Interrupt handler
1594 * we cannot insert the intrc directly, as we never know
1603 debug("SigInt()\n");
1604 if (fore
&& displays
)
1606 # if defined(TERMIO) || defined(POSIX)
1607 ibuf
= displays
->d_OldMode
.tio
.c_cc
[VINTR
];
1609 ibuf
= displays
->d_OldMode
.m_tchars
.t_intrc
;
1612 write(fore
->w_ptyfd
, &ibuf
, 1);
1615 signal(SIGINT
, SigInt
);
1616 debug("SigInt() careful\n");
1617 InterruptPlease
= 1;
1625 struct display
*disp
;
1628 #if defined(SYSVSIGS) && defined(SIGHASARG)
1629 signal(sigsig
, SIG_IGN
);
1635 sprintf(buf
, "\r\n[screen caught signal %d.%s]\r\n", sigsig
,
1637 sprintf(buf
, "\r\n[screen caught a fatal signal.%s]\r\n",
1639 #if defined(SHADOWPW) && !defined(DEBUG) && !defined(DUMPSHADOW)
1641 #else /* SHADOWPW && !DEBUG */
1643 #endif /* SHADOWPW && !DEBUG */
1645 for (disp
= displays
; disp
; disp
= disp
->d_next
)
1647 fcntl(disp
->d_userfd
, F_SETFL
, 0);
1648 SetTTY(disp
->d_userfd
, &D_OldMode
);
1649 write(disp
->d_userfd
, buf
, strlen(buf
));
1650 Kill(disp
->d_userpid
, SIG_BYE
);
1652 #if defined(SHADOWPW) && !defined(DEBUG) && !defined(DUMPSHADOW)
1653 Kill(getpid(), SIGKILL
);
1655 #else /* SHADOWPW && !DEBUG */
1657 #endif /* SHADOWPW && !DEBUG */
1665 struct win
*p
, *next
;
1674 while ((pid
= waitpid(-1, &wstat
, WNOHANG
| WUNTRACED
)) > 0)
1678 * From: rouilj@sni-usa.com (John Rouillard)
1679 * note that WUNTRACED is not documented to work, but it is defined in
1680 * /usr/include/sys/wait.h, so it may work
1682 while ((pid
= wait2(&wstat
, WNOHANG
| WUNTRACED
)) > 0)
1683 # else /* USE_WAIT2 */
1684 while ((pid
= wait3(&wstat
, WNOHANG
| WUNTRACED
, (struct rusage
*) 0)) > 0)
1685 # endif /* USE_WAIT2 */
1688 while ((pid
= wait(&wstat
)) < 0)
1692 #endif /* BSDJOBS */
1694 for (p
= windows
; p
; p
= next
)
1697 if ( (p
->w_pid
&& pid
== p
->w_pid
) ||
1698 (p
->w_deadpid
&& pid
== p
->w_deadpid
) )
1700 /* child has ceased to exist */
1704 if (WIFSTOPPED(wstat
))
1706 debug3("Window %d pid %d: WIFSTOPPED (sig %d)\n", p
->w_number
, pid
, WSTOPSIG(wstat
));
1708 if (WSTOPSIG(wstat
) == SIGTTIN
)
1710 Msg(0, "Suspended (tty input)");
1715 if (WSTOPSIG(wstat
) == SIGTTOU
)
1717 Msg(0, "Suspended (tty output)");
1721 /* Try to restart process */
1722 Msg(0, "Child has been stopped, restarting.");
1723 if (killpg(pid
, SIGCONT
))
1729 WindowDied(p
, wstat
, 1);
1734 if (p
->w_pwin
&& pid
== p
->w_pwin
->p_pid
)
1736 debug2("pseudo of win Nr %d died. pid == %d\n", p
->w_number
, p
->w_pwin
->p_pid
);
1744 debug1("pid %d not found - hope that's ok\n", pid
);
1751 FinitHandler SIGDEFARG
1754 debug1("FinitHandler called, sig %d.\n", sigsig
);
1756 debug("FinitHandler called.\n");
1766 signal(SIGCHLD
, SIG_DFL
);
1767 signal(SIGHUP
, SIG_IGN
);
1768 debug1("Finit(%d);\n", i
);
1774 struct win
*p
= windows
;
1775 windows
= windows
->w_next
;
1778 if (ServerSocket
!= -1)
1780 debug1("we unlink(%s)\n", SockPath
);
1785 (void) unlink(SockPath
);
1791 for (display
= displays
; display
; display
= display
->d_next
)
1799 AddStr("[screen is terminating]\r\n");
1801 SetTTY(D_userfd
, &D_OldMode
);
1802 fcntl(D_userfd
, F_SETFL
, 0);
1804 Kill(D_userpid
, SIG_BYE
);
1807 * we _cannot_ call eexit(i) here,
1808 * instead of playing with the Socket above. Sigh.
1818 if (ServerSocket
!= -1)
1820 debug1("we unlink(%s)\n", SockPath
);
1823 (void) unlink(SockPath
);
1833 debug1("Hangup %x\n", display
);
1839 if (auto_detach
|| displays
->d_next
)
1846 * Detach now has the following modes:
1847 *D_DETACH SIG_BYE detach backend and exit attacher
1848 *D_HANGUP SIG_BYE detach backend and exit attacher
1849 *D_STOP SIG_STOP stop attacher (and detach backend)
1850 *D_REMOTE SIG_BYE remote detach -- reattach to new attacher
1851 *D_POWER SIG_POWER_BYE power detach -- attacher kills his parent
1852 *D_REMOTE_POWER SIG_POWER_BYE remote power detach -- both
1853 *D_LOCK SIG_LOCK lock the attacher
1855 * we always remove our utmp slots. (even when "lock" or "stop")
1856 * Note: Take extra care here, we may be called by interrupt!
1869 #define AddStrSock(msg) do { \
1872 AddStr("[" msg " from "); \
1877 AddStr("[" msg "]\r\n"); \
1880 signal(SIGHUP
, SIG_IGN
);
1881 debug1("Detach(%d)\n", mode
);
1893 AddStrSock("detached");
1901 #ifdef REMOTE_DETACH
1903 AddStrSock("remote detached");
1909 AddStrSock("power detached");
1910 if (PowDetachString
)
1912 AddStr(PowDetachString
);
1915 sign
= SIG_POWER_BYE
;
1917 #ifdef REMOTE_DETACH
1918 case D_REMOTE_POWER
:
1919 AddStrSock("remote power detached");
1920 if (PowDetachString
)
1922 AddStr(PowDetachString
);
1925 sign
= SIG_POWER_BYE
;
1932 /* tell attacher to lock terminal with a lockprg. */
1936 if (displays
->d_next
== 0)
1938 for (p
= windows
; p
; p
= p
->w_next
)
1940 if (p
->w_slot
!= (slot_t
) -1 && !(p
->w_lflag
& 2))
1944 * Set the slot to 0 to get the window
1947 p
->w_slot
= (slot_t
) 0;
1951 if (mode
!= D_HANGUP
)
1954 if (displays
->d_next
== 0 && console_window
)
1956 if (TtyGrabConsole(console_window
->w_ptyfd
, 0, "detach"))
1958 debug("could not release console - killing window\n");
1959 KillWindow(console_window
);
1960 display
= displays
; /* restore display */
1966 ReleaseAutoWritelock(display
, D_fore
);
1968 D_user
->u_detachwin
= D_fore
->w_number
;
1969 D_user
->u_detachotherwin
= D_other
? D_other
->w_number
: -1;
1971 AutosaveLayout(D_layout
);
1972 layout_last
= D_layout
;
1973 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
1975 p
= Layer2Window(cv
->c_layer
);
1976 SetCanvasWindow(cv
, 0);
1978 WindowChanged(p
, 'u');
1982 debug2("display: %#x displays: %#x\n", (unsigned int)display
, (unsigned int)displays
);
1985 /* Flag detached-ness */
1988 * tell father what to do. We do that after we
1989 * freed the tty, thus getty feels more comfortable on hpux
1990 * if it was a power detach.
1993 debug2("Detach: Signal %d to Attacher(%d)!\n", sign
, pid
);
1994 debug("Detach returns, we are successfully detached.\n");
1995 signal(SIGHUP
, SigHup
);
2006 return strncmp(e
, s
, l
) == 0 && e
[l
] == '=';
2012 register char **op
, **np
;
2013 static char stybuf
[MAXSTR
];
2015 for (op
= environ
; *op
; ++op
)
2018 free((char *)NewEnv
);
2019 NewEnv
= np
= (char **) malloc((unsigned) (op
- environ
+ 7 + 1) * sizeof(char **));
2022 sprintf(stybuf
, "STY=%s", strlen(SockName
) <= MAXSTR
- 5 ? SockName
: "?");
2023 *np
++ = stybuf
; /* NewEnv[0] */
2024 *np
++ = Term
; /* NewEnv[1] */
2025 np
++; /* room for SHELL */
2027 np
+= 2; /* room for TERMCAP and WINDOW */
2029 np
+= 4; /* room for TERMCAP WINDOW LINES COLUMNS */
2032 for (op
= environ
; *op
; ++op
)
2034 if (!IsSymbol(*op
, "TERM") && !IsSymbol(*op
, "TERMCAP")
2035 && !IsSymbol(*op
, "STY") && !IsSymbol(*op
, "WINDOW")
2036 && !IsSymbol(*op
, "SCREENCAP") && !IsSymbol(*op
, "SHELL")
2037 && !IsSymbol(*op
, "LINES") && !IsSymbol(*op
, "COLUMNS")
2046 #if defined(USEVARARGS) && defined(__STDC__)
2047 Msg(int err
, char *fmt
, VA_DOTS
)
2049 Msg(err
, fmt
, VA_DOTS
)
2056 char buf
[MAXPATHLEN
*2];
2061 (void)vsnprintf(p
, sizeof(buf
) - 100, fmt
, VA_ARGS(ap
));
2068 strncpy(p
, strerror(err
), buf
+ sizeof(buf
) - p
- 1);
2069 buf
[sizeof(buf
) - 1] = 0;
2071 debug2("Msg('%s') (%#x);\n", buf
, (unsigned int)display
);
2073 if (display
&& displays
)
2077 for (display
= displays
; display
; display
= display
->d_next
)
2082 /* no displays but a display - must have forked.
2083 * send message to backend!
2085 char *tty
= D_usertty
;
2086 struct display
*olddisplay
= display
;
2087 display
= 0; /* only send once */
2088 SendErrorMsg(tty
, buf
);
2089 display
= olddisplay
;
2092 printf("%s\r\n", buf
);
2096 * Call FinitTerm for all displays, write a message to each and call eexit();
2100 #if defined(USEVARARGS) && defined(__STDC__)
2101 Panic(int err
, char *fmt
, VA_DOTS
)
2103 Panic(err
, fmt
, VA_DOTS
)
2110 char buf
[MAXPATHLEN
*2];
2115 (void)vsnprintf(p
, sizeof(buf
) - 100, fmt
, VA_ARGS(ap
));
2122 strncpy(p
, strerror(err
), buf
+ sizeof(buf
) - p
- 1);
2123 buf
[sizeof(buf
) - 1] = 0;
2125 debug3("Panic('%s'); display=%x displays=%x\n", buf
, display
, displays
);
2126 if (displays
== 0 && display
== 0)
2128 printf("%s\r\n", buf
);
2130 Kill(PanicPid
, SIG_BYE
);
2132 else if (displays
== 0)
2134 /* no displays but a display - must have forked.
2135 * send message to backend!
2137 char *tty
= D_usertty
;
2139 SendErrorMsg(tty
, buf
);
2144 for (display
= displays
; display
; display
= display
->d_next
)
2153 SetTTY(D_userfd
, &D_OldMode
);
2154 fcntl(D_userfd
, F_SETFL
, 0);
2155 write(D_userfd
, buf
, strlen(buf
));
2156 write(D_userfd
, "\n", 1);
2159 Kill(D_userpid
, SIG_BYE
);
2162 if (tty_oldmode
>= 0)
2165 if (setuid(own_uid
))
2166 xseteuid(own_uid
); /* may be a loop. sigh. */
2170 debug1("Panic: changing back modes from %s\n", attach_tty
);
2171 chmod(attach_tty
, tty_oldmode
);
2179 * '^' is allowed as an escape mechanism for control characters. jw.
2181 * Added time insertion using ideas/code from /\ndy Jones
2182 * (andy@lingua.cltr.uq.OZ.AU) - thanks a lot!
2187 static const char days
[] = "SunMonTueWedThuFriSat";
2188 static const char months
[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
2191 static char winmsg_buf
[MAXSTR
];
2192 #define MAX_WINMSG_REND 16 /* rendition changes */
2193 static int winmsg_rend
[MAX_WINMSG_REND
];
2194 static int winmsg_rendpos
[MAX_WINMSG_REND
];
2195 static int winmsg_numrend
;
2198 pad_expand(buf
, p
, numpad
, padlen
)
2207 padlen
= padlen
- (p
- buf
); /* space for rent */
2210 pn2
= pn
= p
+ padlen
;
2214 if (r
&& *p
!= 127 && p
- buf
== winmsg_rendpos
[r
- 1])
2216 winmsg_rendpos
[--r
] = pn
- buf
;
2223 i
= numpad
> 0 ? (padlen
+ numpad
- 1) / numpad
: 0;
2228 if (r
&& p
- buf
== winmsg_rendpos
[r
- 1])
2229 winmsg_rendpos
[--r
] = pn
- buf
;
2236 struct backtick
*next
;
2241 char result
[MAXSTR
];
2248 struct backtick
*backticks
;
2252 struct backtick
*bt
;
2257 for (p
= q
= bt
->result
; (c
= (unsigned char)*p
++) != 0;)
2261 if (c
>= ' ' || c
== '\005')
2268 backtick_fn(ev
, data
)
2272 struct backtick
*bt
;
2275 bt
= (struct backtick
*)data
;
2276 debug1("backtick_fn for #%d\n", bt
->num
);
2278 l
= read(ev
->fd
, bt
->buf
+ i
, MAXSTR
- i
);
2281 debug1("EOF on backtick #%d\n", bt
->num
);
2287 debug1("read %d bytes\n", l
);
2289 for (j
= 0; j
< l
; j
++)
2290 if (bt
->buf
[i
- j
- 1] == '\n')
2294 for (k
= i
- j
- 2; k
>= 0; k
--)
2295 if (bt
->buf
[k
] == '\n')
2298 bcopy(bt
->buf
+ k
, bt
->result
, i
- j
- k
);
2299 bt
->result
[i
- j
- k
- 1] = 0;
2300 backtick_filter(bt
);
2301 WindowChanged(0, '`');
2303 if (j
== l
&& i
== MAXSTR
)
2311 bcopy(bt
->buf
+ i
- j
, bt
->buf
, j
);
2318 setbacktick(num
, lifespan
, tick
, cmdv
)
2324 struct backtick
**btp
, *bt
;
2327 debug1("setbacktick called for backtick #%d\n", num
);
2328 for (btp
= &backticks
; (bt
= *btp
) != 0; btp
= &bt
->next
)
2335 for (v
= bt
->cmdv
; *v
; v
++)
2352 bt
= (struct backtick
*)malloc(sizeof *bt
);
2358 bzero(bt
, sizeof(*bt
));
2364 bt
->lifespan
= lifespan
;
2371 if (bt
->tick
== 0 && bt
->lifespan
== 0)
2373 debug("setbacktick: continuous mode\n");
2374 bt
->buf
= (char *)malloc(MAXSTR
);
2378 setbacktick(num
, 0, 0, (char **)0);
2381 bt
->ev
.type
= EV_READ
;
2382 bt
->ev
.fd
= readpipe(bt
->cmdv
);
2383 bt
->ev
.handler
= backtick_fn
;
2384 bt
->ev
.data
= (char *)bt
;
2391 runbacktick(bt
, tickp
, now
)
2392 struct backtick
*bt
;
2399 debug1("runbacktick called for backtick #%d\n", bt
->num
);
2400 if (bt
->tick
&& (!*tickp
|| bt
->tick
< *tickp
))
2402 if ((bt
->lifespan
== 0 && bt
->tick
== 0) || now
< bt
->bestbefore
)
2404 debug1("returning old result (%d)\n", bt
->lifespan
);
2407 f
= readpipe(bt
->cmdv
);
2411 while ((l
= read(f
, bt
->result
+ i
, sizeof(bt
->result
) - i
)) > 0)
2413 debug1("runbacktick: read %d bytes\n", l
);
2415 for (j
= 1; j
< l
; j
++)
2416 if (bt
->result
[i
- j
- 1] == '\n')
2418 if (j
== l
&& i
== sizeof(bt
->result
))
2420 j
= sizeof(bt
->result
) / 2;
2425 bcopy(bt
->result
+ i
- j
, bt
->result
, j
);
2430 bt
->result
[sizeof(bt
->result
) - 1] = '\n';
2431 if (i
&& bt
->result
[i
- 1] == '\n')
2433 debug1("runbacktick: finished, %d bytes\n", i
);
2435 backtick_filter(bt
);
2437 bt
->bestbefore
= now2
+ bt
->lifespan
;
2442 AppendWinMsgRend(str
, color
)
2447 if (winmsg_numrend
>= MAX_WINMSG_REND
)
2449 p
= winmsg_buf
+ strlen(winmsg_buf
);
2454 r
= ParseAttrColor(color
, 0, 0);
2458 winmsg_rend
[winmsg_numrend
] = r
;
2459 winmsg_rendpos
[winmsg_numrend
] = p
- winmsg_buf
;
2462 strncpy(p
, str
, winmsg_buf
+ sizeof(winmsg_buf
) - p
);
2466 AddWinMsgRend(str
, r
)
2470 if (winmsg_numrend
>= MAX_WINMSG_REND
|| str
< winmsg_buf
||
2471 str
>= winmsg_buf
+ MAXSTR
)
2474 winmsg_rend
[winmsg_numrend
] = r
;
2475 winmsg_rendpos
[winmsg_numrend
] = str
- winmsg_buf
;
2482 MakeWinMsgEv(str
, win
, esc
, padlen
, ev
, rec
)
2492 register char *p
= winmsg_buf
;
2502 int qmflag
= 0, omflag
= 0, qmnumrend
= 0;
2509 struct backtick
*bt
;
2511 if (winmsg_numrend
>= 0)
2514 winmsg_numrend
= -winmsg_numrend
;
2517 if (ScriptProcessCaption(str
, win
, padlen
))
2525 gettimeofday(&now
, NULL
);
2526 for (s
= str
; *s
&& (l
= winmsg_buf
+ MAXSTR
- 1 - p
) > 0; s
++, p
++)
2532 if (*s
!= '^' && *s
>= 64)
2557 if (*++s
== esc
) /* double escape ? */
2559 if ((plusflg
= *s
== '+') != 0)
2561 if ((minusflg
= *s
== '-') != 0)
2563 if ((zeroflg
= *s
== '0') != 0)
2566 while(*s
>= '0' && *s
<= '9')
2567 num
= num
* 10 + (*s
++ - '0');
2568 if ((longflg
= *s
== 'L') != 0)
2576 if ((!qmflag
&& !omflag
) || omflag
== 1)
2579 if (qmnumrend
< winmsg_numrend
)
2580 winmsg_numrend
= qmnumrend
;
2586 qmnumrend
= winmsg_numrend
;
2587 qmflag
= omflag
= 0;
2593 if (qmflag
&& omflag
!= 1)
2597 qmnumrend
= winmsg_numrend
;
2602 if (qmnumrend
< winmsg_numrend
)
2603 winmsg_numrend
= qmnumrend
;
2607 case 'd': case 'D': case 'm': case 'M': case 'y': case 'Y':
2608 case 'a': case 'A': case 's': case 'c': case 'C':
2613 time_t nowsec
= now
.tv_sec
;
2614 tm
= localtime(&nowsec
);
2617 if (!tick
|| tick
> 3600)
2622 sprintf(p
, "%02d", tm
->tm_mday
% 100);
2626 strftime(p
, l
, (longflg
? "%A" : "%a"), tm
);
2628 sprintf(p
, "%3.3s", days
+ 3 * tm
->tm_wday
);
2632 sprintf(p
, "%02d", tm
->tm_mon
+ 1);
2636 strftime(p
, l
, (longflg
? "%B" : "%b"), tm
);
2638 sprintf(p
, "%3.3s", months
+ 3 * tm
->tm_mon
);
2642 sprintf(p
, "%02d", tm
->tm_year
% 100);
2645 sprintf(p
, "%04d", tm
->tm_year
+ 1900);
2648 sprintf(p
, tm
->tm_hour
>= 12 ? "pm" : "am");
2651 sprintf(p
, tm
->tm_hour
>= 12 ? "PM" : "AM");
2654 sprintf(p
, "%02d", tm
->tm_sec
);
2658 sprintf(p
, zeroflg
? "%02d:%02d" : "%2d:%02d", tm
->tm_hour
, tm
->tm_min
);
2659 if (!tick
|| tick
> 60)
2663 sprintf(p
, zeroflg
? "%02d:%02d" : "%2d:%02d", (tm
->tm_hour
+ 11) % 12 + 1, tm
->tm_min
);
2664 if (!tick
|| tick
> 60)
2684 if (!tick
|| tick
> 60)
2693 if (rec
>= 10 || (*s
== 'h' && (win
== 0 || win
->w_hstatus
== 0 || *win
->w_hstatus
== 0)))
2700 for (bt
= backticks
; bt
; bt
= bt
->next
)
2710 char savebuf
[sizeof(winmsg_buf
)];
2712 int oldnumrend
= winmsg_numrend
;
2715 strcpy(savebuf
, winmsg_buf
);
2716 winmsg_numrend
= -winmsg_numrend
;
2717 MakeWinMsgEv(*s
== 'h' ? win
->w_hstatus
: runbacktick(bt
, &oldtick
, now
.tv_sec
), win
, '\005', 0, (struct event
*)0, rec
+ 1);
2718 debug2("oldtick=%d tick=%d\n", oldtick
, tick
);
2719 if (!tick
|| oldtick
< tick
)
2721 if ((int)strlen(winmsg_buf
) < l
)
2722 strcat(savebuf
, winmsg_buf
);
2723 strcpy(winmsg_buf
, savebuf
);
2724 while (oldnumrend
< winmsg_numrend
)
2725 winmsg_rendpos
[oldnumrend
++] += p
- winmsg_buf
;
2734 struct win
*oldfore
= 0;
2742 ss
= AddWindows(p
, l
- 1, (*s
== 'w' ? 0 : 1) | (longflg
? 0 : 2) | (plusflg
? 4 : 0) | (minusflg
? 8 : 0), win
? win
->w_number
: -1);
2753 AddOtherUsers(p
, l
- 1, win
);
2761 AddWindowFlags(p
, l
- 1, win
);
2768 if (win
&& (int)strlen(win
->w_title
) < l
)
2770 strcpy(p
, win
->w_title
);
2780 for (i
= 0; i
< 127; i
++)
2781 if (s
[i
] && s
[i
] != '}')
2785 if (s
[i
] == '}' && winmsg_numrend
< MAX_WINMSG_REND
)
2789 debug1("MakeWinMsg attrcolor %s\n", rbuf
);
2790 if (i
!= 1 || rbuf
[0] != '-')
2791 r
= ParseAttrColor(rbuf
, (char *)0, 0);
2792 if (r
!= -1 || (i
== 1 && rbuf
[0] == '-'))
2794 winmsg_rend
[winmsg_numrend
] = r
;
2795 winmsg_rendpos
[winmsg_numrend
] = p
- winmsg_buf
;
2805 if ((int)strlen(HostName
) < l
)
2807 strcpy(p
, HostName
);
2817 session_name
= strchr(SockName
, '.') + 1;
2818 if ((int)strlen(session_name
) < l
)
2820 strcpy(p
, session_name
);
2829 sprintf(p
, "%d", (plusflg
&& display
) ? D_userpid
: getpid());
2836 if (display
&& ((ev
&& ev
== &D_forecv
->c_captev
) || (!ev
&& win
&& win
== D_fore
)))
2837 minusflg
= !minusflg
;
2842 truncpos
= p
- winmsg_buf
;
2843 truncper
= num
> 100 ? 100 : num
;
2844 trunclong
= longflg
;
2850 if (num
|| zeroflg
|| plusflg
|| longflg
|| (*s
!= '='))
2852 /* expand all pads */
2855 num
= (plusflg
? lastpad
: padlen
) - num
;
2856 if (!plusflg
&& padlen
== 0)
2857 num
= p
- winmsg_buf
;
2862 if (*s
!= '=' && num
== 0 && !plusflg
)
2867 num
= p
- winmsg_buf
;
2869 num
= (padlen
- (plusflg
? lastpad
: 0)) * num
/ 100;
2875 if (num
> MAXSTR
- 1)
2878 p
= pad_expand(winmsg_buf
, p
, numpad
, num
);
2880 if (p
- winmsg_buf
> num
&& !longflg
)
2889 trunc
= lastpad
+ truncper
* (num
- lastpad
) / 100;
2892 if (trunc
< lastpad
)
2894 left
= truncpos
- trunc
;
2895 if (left
> p
- winmsg_buf
- num
)
2896 left
= p
- winmsg_buf
- num
;
2897 debug1("lastpad = %d, ", lastpad
);
2898 debug3("truncpos = %d, trunc = %d, left = %d\n", truncpos
, trunc
, left
);
2901 if (left
+ lastpad
> p
- winmsg_buf
)
2902 left
= p
- winmsg_buf
- lastpad
;
2903 if (p
- winmsg_buf
- lastpad
- left
> 0)
2904 bcopy(winmsg_buf
+ lastpad
+ left
, winmsg_buf
+ lastpad
, p
- winmsg_buf
- lastpad
- left
);
2907 while (r
&& winmsg_rendpos
[r
- 1] > lastpad
)
2910 winmsg_rendpos
[r
] -= left
;
2911 if (winmsg_rendpos
[r
] < lastpad
)
2912 winmsg_rendpos
[r
] = lastpad
;
2916 if (p
- winmsg_buf
> lastpad
)
2917 winmsg_buf
[lastpad
] = '.';
2918 if (p
- winmsg_buf
> lastpad
+ 1)
2919 winmsg_buf
[lastpad
+ 1] = '.';
2920 if (p
- winmsg_buf
> lastpad
+ 2)
2921 winmsg_buf
[lastpad
+ 2] = '.';
2924 if (p
- winmsg_buf
> num
)
2926 p
= winmsg_buf
+ num
;
2929 if (num
- 1 >= lastpad
)
2931 if (num
- 2 >= lastpad
)
2933 if (num
- 3 >= lastpad
)
2937 while (r
&& winmsg_rendpos
[r
- 1] > num
)
2938 winmsg_rendpos
[--r
] = num
;
2942 if (lastpad
> p
- winmsg_buf
)
2943 lastpad
= p
- winmsg_buf
;
2944 debug1("lastpad now %d\n", lastpad
);
2948 while (p
- winmsg_buf
< num
)
2950 lastpad
= p
- winmsg_buf
;
2953 debug1("lastpad2 now %d\n", lastpad
);
2959 *p
= 127; /* internal pad representation */
2973 sprintf(p
, "%*s", num
, num
> 1 ? "--" : "-");
2975 sprintf(p
, "%*d", num
, win
->w_number
);
2982 if (qmpos
&& !qmflag
)
2987 if (padlen
> MAXSTR
- 1)
2988 padlen
= MAXSTR
- 1;
2989 p
= pad_expand(winmsg_buf
, p
, numpad
, padlen
);
2993 evdeq(ev
); /* just in case */
2994 ev
->timeout
.tv_sec
= 0;
2995 ev
->timeout
.tv_usec
= 0;
2999 now
.tv_usec
= 100000;
3003 now
.tv_sec
+= tick
- (now
.tv_sec
% tick
);
3005 debug2("NEW timeout %d %d\n", ev
->timeout
.tv_sec
, tick
);
3011 MakeWinMsg(s
, win
, esc
)
3016 return MakeWinMsgEv(s
, win
, esc
, 0, (struct event
*)0, 0);
3020 PutWinMsg(s
, start
, max
)
3026 struct mchar rendstack
[MAX_WINMSG_REND
];
3029 if (s
!= winmsg_buf
)
3031 /* sorry, no fancy coloring available */
3032 debug1("PutWinMsg %s plain\n", s
);
3045 debug2("PutWinMsg %s start attr %x\n", s
, rend
.attr
);
3046 for (i
= 0; i
< winmsg_numrend
&& max
> 0; i
++)
3048 if (p
> winmsg_rendpos
[i
] || winmsg_rendpos
[i
] > l
)
3050 if (p
< winmsg_rendpos
[i
])
3052 n
= winmsg_rendpos
[i
] - p
;
3069 rend
= rendstack
[--rendstackn
];
3073 rendstack
[rendstackn
++] = rend
;
3074 ApplyAttrColor(r
, &rend
);
3076 SetRendition(&rend
);
3104 if ((j
= open("/dev/null", 0)) >= 0)
3111 while (dup(++i
) < 0 && errno
!= EBADF
)
3113 debug1(" [%d]\n", i
);
3126 serv_read_fn(ev
, data
)
3130 debug("Knock - knock!\n");
3135 serv_select_fn(ev
, data
)
3141 debug("serv_select_fn called\n");
3142 /* XXX: messages?? */
3147 if (InterruptPlease
)
3149 debug("Backend received interrupt\n");
3150 /* This approach is rather questionable in a multi-display
3152 if (fore
&& displays
)
3154 #if defined(TERMIO) || defined(POSIX)
3155 char ibuf
= displays
->d_OldMode
.tio
.c_cc
[VINTR
];
3157 char ibuf
= displays
->d_OldMode
.m_tchars
.t_intrc
;
3160 write(W_UWP(fore
) ? fore
->w_pwin
->p_ptyfd
: fore
->w_ptyfd
,
3162 debug1("Backend wrote interrupt to %d", fore
->w_number
);
3163 debug1("%s\n", W_UWP(fore
) ? " (pseudowin)" : "");
3165 write(fore
->w_ptyfd
, &ibuf
, 1);
3166 debug1("Backend wrote interrupt to %d\n", fore
->w_number
);
3169 InterruptPlease
= 0;
3172 for (p
= windows
; p
; p
= p
->w_next
)
3174 if (p
->w_bell
== BELL_FOUND
|| p
->w_bell
== BELL_VISUAL
)
3177 int visual
= p
->w_bell
== BELL_VISUAL
|| visual_bell
;
3178 p
->w_bell
= BELL_ON
;
3179 for (display
= displays
; display
; display
= display
->d_next
)
3181 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
3182 if (cv
->c_layer
->l_bottom
== &p
->w_layer
)
3186 p
->w_bell
= BELL_DONE
;
3187 Msg(0, "%s", MakeWinMsg(BellString
, p
, '%'));
3189 else if (visual
&& !D_VB
&& (!D_status
|| !D_status_bell
))
3191 Msg(0, "%s", VisualBellString
);
3195 debug1("using vbell timeout %d\n", VBellWait
);
3196 SetTimeout(&D_statusev
, VBellWait
);
3200 /* don't annoy the user with two messages */
3201 if (p
->w_monitor
== MON_FOUND
)
3202 p
->w_monitor
= MON_DONE
;
3203 WindowChanged(p
, 'f');
3205 if (p
->w_monitor
== MON_FOUND
)
3208 p
->w_monitor
= MON_ON
;
3209 for (display
= displays
; display
; display
= display
->d_next
)
3211 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
3212 if (cv
->c_layer
->l_bottom
== &p
->w_layer
)
3215 continue; /* user already sees window */
3217 if (!(ACLBYTE(p
->w_mon_notify
, D_user
->u_id
) & ACLBIT(D_user
->u_id
)))
3218 continue; /* user doesn't care */
3220 Msg(0, "%s", MakeWinMsg(ActivityString
, p
, '%'));
3221 p
->w_monitor
= MON_DONE
;
3223 WindowChanged(p
, 'f');
3227 for (display
= displays
; display
; display
= display
->d_next
)
3230 if (D_status
== STATUS_ON_WIN
)
3232 /* XXX: should use display functions! */
3233 for (cv
= D_cvlist
; cv
; cv
= cv
->c_next
)
3237 /* normalize window, see resize.c */
3238 lx
= cv
->c_layer
->l_x
;
3239 ly
= cv
->c_layer
->l_y
;
3240 if (lx
== cv
->c_layer
->l_width
)
3242 if (ly
+ cv
->c_yoff
< cv
->c_ys
)
3244 int i
, n
= cv
->c_ys
- (ly
+ cv
->c_yoff
);
3245 cv
->c_yoff
= cv
->c_ys
- ly
;
3246 RethinkViewportOffsets(cv
);
3247 if (n
> cv
->c_layer
->l_height
)
3248 n
= cv
->c_layer
->l_height
;
3250 LScrollV(flayer
, -n
, 0, flayer
->l_height
- 1, 0);
3251 LayRedisplayLine(-1, -1, -1, 1);
3252 for (i
= 0; i
< n
; i
++)
3253 LayRedisplayLine(i
, 0, flayer
->l_width
- 1, 1);
3254 if (cv
== cv
->c_display
->d_forecv
)
3258 else if (ly
+ cv
->c_yoff
> cv
->c_ye
)
3260 int i
, n
= ly
+ cv
->c_yoff
- cv
->c_ye
;
3261 cv
->c_yoff
= cv
->c_ye
- ly
;
3262 RethinkViewportOffsets(cv
);
3263 if (n
> cv
->c_layer
->l_height
)
3264 n
= cv
->c_layer
->l_height
;
3266 LScrollV(flayer
, n
, 0, cv
->c_layer
->l_height
- 1, 0);
3267 LayRedisplayLine(-1, -1, -1, 1);
3268 for (i
= 0; i
< n
; i
++)
3269 LayRedisplayLine(i
+ flayer
->l_height
- n
, 0, flayer
->l_width
- 1, 1);
3270 if (cv
== cv
->c_display
->d_forecv
)
3274 if (lx
+ cv
->c_xoff
< cv
->c_xs
)
3276 int i
, n
= cv
->c_xs
- (lx
+ cv
->c_xoff
);
3277 if (n
< (cv
->c_xe
- cv
->c_xs
+ 1) / 2)
3278 n
= (cv
->c_xe
- cv
->c_xs
+ 1) / 2;
3279 if (cv
->c_xoff
+ n
> cv
->c_xs
)
3280 n
= cv
->c_xs
- cv
->c_xoff
;
3282 RethinkViewportOffsets(cv
);
3283 if (n
> cv
->c_layer
->l_width
)
3284 n
= cv
->c_layer
->l_width
;
3286 LayRedisplayLine(-1, -1, -1, 1);
3287 for (i
= 0; i
< flayer
->l_height
; i
++)
3289 LScrollH(flayer
, -n
, i
, 0, flayer
->l_width
- 1, 0, 0);
3290 LayRedisplayLine(i
, 0, n
- 1, 1);
3292 if (cv
== cv
->c_display
->d_forecv
)
3296 else if (lx
+ cv
->c_xoff
> cv
->c_xe
)
3298 int i
, n
= lx
+ cv
->c_xoff
- cv
->c_xe
;
3299 if (n
< (cv
->c_xe
- cv
->c_xs
+ 1) / 2)
3300 n
= (cv
->c_xe
- cv
->c_xs
+ 1) / 2;
3301 if (cv
->c_xoff
- n
+ cv
->c_layer
->l_width
- 1 < cv
->c_xe
)
3302 n
= cv
->c_xoff
+ cv
->c_layer
->l_width
- 1 - cv
->c_xe
;
3304 RethinkViewportOffsets(cv
);
3305 if (n
> cv
->c_layer
->l_width
)
3306 n
= cv
->c_layer
->l_width
;
3308 LayRedisplayLine(-1, -1, -1, 1);
3309 for (i
= 0; i
< flayer
->l_height
; i
++)
3311 LScrollH(flayer
, n
, i
, 0, flayer
->l_width
- 1, 0, 0);
3312 LayRedisplayLine(i
, flayer
->l_width
- n
, flayer
->l_width
- 1, 1);
3314 if (cv
== cv
->c_display
->d_forecv
)
3321 for (display
= displays
; display
; display
= display
->d_next
)
3323 if (D_status
== STATUS_ON_WIN
|| D_cvlist
== 0 || D_cvlist
->c_next
== 0)
3325 debug1("serv_select_fn: Restore on cv %#x\n", (int)D_forecv
);
3326 CV_CALL(D_forecv
, LayRestore();LaySetCursor());
3331 logflush_fn(ev
, data
)
3339 if (!islogfile(NULL
))
3340 return; /* no more logfiles */
3342 n
= log_flush
? log_flush
: (logtstamp_after
+ 4) / 5;
3345 SetTimeout(ev
, n
* 1000);
3346 evenq(ev
); /* re-enqueue ourself */
3350 /* write fancy time-stamp */
3351 for (p
= windows
; p
; p
= p
->w_next
)
3355 p
->w_logsilence
+= n
;
3356 if (p
->w_logsilence
< logtstamp_after
)
3358 if (p
->w_logsilence
- n
>= logtstamp_after
)
3360 buf
= MakeWinMsg(logtstamp_string
, p
, '%');
3361 logfwrite(p
->w_log
, buf
, strlen(buf
));
3366 * Interprets ^?, ^@ and other ^-control-char notation.
3367 * Interprets \ddd octal notation
3369 * The result is placed in *cp, p is advanced behind the parsed expression and
3378 if (*p
== '^' && p
[1])
3388 else if (*p
== '\\' && *++p
<= '7' && *p
>= '0')
3392 *cp
= *cp
* 8 + *p
- '0';
3393 while (*++p
<= '7' && *p
>= '0');
3404 unsigned char buf
[2];
3407 SetEscape((struct acluser
*)0, -1, -1);
3410 if ((p
= ParseChar(p
, (char *)buf
)) == NULL
||
3411 (p
= ParseChar(p
, (char *)buf
+1)) == NULL
|| *p
)
3413 SetEscape((struct acluser
*)0, buf
[0], buf
[1]);